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Nov 11, 2012 9:00am EST
by approaching this with these interim solutions of energy efficiency and clean natural gas that that can get us to the era 30, 40, 50 years from now when solar and wind and nuclear can all be competitive and take over at that point. >> reporter: china will have to be a big part of the solution. >> china surpassed the united states in 2006, by the end of this year we'll be producing twice the greenhouse gases of the united states. >> reporter: even there, the i.p.c.c.'s raj sees glimmers of hope. >> i spend a lot of time in china. i see a distinct acceptance of the fact that they need to move to a low-carbon future. >> reporter: so the debate continues about how much the earth is warming and exactly what the effects will be. but on the three key questions, all my ex-pers are unanimous. is climate change real? >> yes. absolutely. climate change is real. we've just seen the beginning of it. >> reporter: is human activity contributing to it? >> yes. over 90% evidence that human beings are responsible. >> there is no doubt in my mind that humanity is the main cause. >> reporter: and
Search Results 0 to 1 of about 2 (some duplicates have been removed)